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Solidago uliginosa
is highly variable in stem height and the size of the array, which are greatly influenced by growing conditions. A. Cronquist (1980) treated
S. simulans
as a "broad-leaved extreme of
S.
gracillima
, approaching
S.
uliginosa
." These plants come from a distinctive habitat in western North Carolina, south of more typical populations of
S. uliginosa
; it might warrant recognition as a narrowly distributed endemic. In the north, several different tetraploid races within the species appear to be derived separately from diploids in the eastern and the Great Lakes portion of the range.